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Subject: Re: Crafty 19.13 bug? Mate in 1 position evaluated as draw

Author: Peter Berger

Date: 14:04:37 06/03/04

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On June 03, 2004 at 16:28:33, Robert Allgeuer wrote:

>On June 03, 2004 at 15:32:14, Günther Simon wrote:
>
>>On June 03, 2004 at 14:48:55, Robert Allgeuer wrote:
>>
>>>
>>>In the following endgame position Crafty 19.13 (I have tried both the compiles
>>>by Slater Wold and Dann Corbit) analyses this as a draw with score 0.00. Crafty
>>>19.6 on the other hand correctly detects the mate in one.
>>>
>>>Winboard, hash 96 Mb, Athlon 2400+, all 5 piece EGTBs installed.
>>>
>>>[d]8/6P1/8/8/2b5/8/p1k2p2/K7 b - - 0 90
>>>
>>>Robert
>>
>>Hi Robert, which dates have your versions?
>>Even if you had tried both named compiled ones, it's still
>>possible that those are first releases of Crafty 19.13,
>>which had a tablebase bug.
>>
>>Günther
>
>I am aware that there was this bug and consequently 2 different 19.13 versions,
>therefore I downloaded after that, so I am pretty sure I have the corrected
>version.
>The compile of Slater Wold has been downloaded on 13.5.2004, the one from Dann
>Corbit just a week ago.
>Can anybody reproduce the result (with 5 piece EGTBs) or does Crafty 19.13
>detect a mate for everybody else and it is a problem just on my machine? Corrupt
>EGTBs cannot be the reason, because 19.6 uses exactly the same EGTB files.
>
>Robert

I think there might indeed be a bug here, but it is probably crucial to have
your exact commands to work things out IMHO.

Although I can't reproduce your actual problem, I can manage to get some
unexpected/strange output in case Crafty is about to deliver a  mate in one with
"analyze".

Could you post your crafty.rc and any input you entered before feeding the
position to Crafty ?

Peter



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